Given the reaction 2N2O(g)+O2(g)<==>4NO(g), predict the effect of each of the following stressors : a) increasing the pressure- - - shift left, right, or no change b)removing O2- - - shift left, right, or no change c)adding NO- - - shift left, right, or no change d)adding N2O- - - shift left , right, or no change e) adding a catalyst- - - shift left, right, or no change